#!/bin/sh

die() {
    echo $netif: "$@" 1>&2
    exit 1
}

do_static() {
    [ -n "$ip" ] || die "static: need IP address"
    [ -n "$mask" ] || {
	net=${ip%%.*}
	mask=255.0.0.0
	[ $net -ge 128 ] && mask=255.255.0.0
	[ $net -ge 192 ] && mask=255.255.255.0
    }
    ip addr add $ip/$mask dev $netif || die "static: setting IP $ip/$mask"
    [ -n "$gw" ] && {
	ip route add default via $gw dev $netif ||
	    die "static: setting default route via $gw"
    }
    ip link set $netif up 
    [ -e /tmp/hostname.set ] || {
	[ -n "$hostname" ] && mknod /tmp/hostname.set p 2>/dev/null &&
	    hostname $hostname
    }
    [ -n "$srv" ] &&
	echo "new_dhcp_server_identifier=$srv" > /tmp/dhclient.$netif.dhcpopts

    >/tmp/net.$netif.up
    echo online > /sys/class/net/$netif/uevent
}

do_dhcp() {
    # /sbin/dhclient-script will mark the netif up and generate the online
    # event for nfsroot
    # XXX add -V vendor class and option parsing per kernel
    dhclient -1 -q -cf /etc/dhclient.conf -pf /tmp/dhclient.$netif.pid -lf /tmp/dhclient.$netif.lease $netif
}

PATH=$PATH:/sbin:/usr/sbin

. /lib/dracut-lib

if getarg rdnetdebug ; then
    exec >/tmp/ifup.$1.$$.out
    exec 2>>/tmp/ifup.$1.$$.out
    set -x
fi

# Huh? No $1?
[ -z "$1" ] && exit 1

# $netif reads easier than $1
netif=$1

# bail immediately if the interface is already up
# or we don't need the network
[ -f "/tmp/net.$netif.up" ] && exit 0
[ -f "/tmp/root.info" ] || exit 0
. /tmp/root.info
[ -z "$netroot" ] && exit 0

# loopback is always handled the same way
if [ "$netif" = "lo" ] ; then
    ip link set lo up
    ip addr add 127.0.0.1/8 dev lo
    >/tmp/net.$netif.up
    exit 0
fi

# XXX need error handling like dhclient-script

# No ip lines default to dhcp
ip=$(getarg ip)
[ -z "$ip" ] && do_dhcp;

# Specific configuration, spin through the kernel command line
# looking for ip= lines
[ "$CMDLINE" ] || read CMDLINE </proc/cmdline;
for p in $CMDLINE; do
    [ -n "${p%ip=*}" ] && continue
    ip_to_var ${p#ip=}
	
    # If this option isn't directed at our interface, skip it
    [ "$dev" = "$netif" ] || continue

    # Store config for later use
    for i in ip srv gw mask hostname; do
	eval '[ "$'$i'" ] && echo '$i'="$'$i'"'
    done > /tmp/net.$netif.override

    case $autoconf in
	static)		 do_static ;;
	dhcp|on|any)	 do_dhcp ;;
	bootp|rarp|both) die "autoconfig type $autoconf is not supported" ;;
	''|none|off)	 ;;
	esac
	break
    done
fi
exit 0